Paper making machine



April 28, 1936. D. c. BERT PAPER MAKING MACHINE Filed Dec. ll, 1954 3 Sheets-,Sheet 1 O @trouw/13.1,

April 28, 1936. D. c. BERT PAPER MAKING MACHINE Filed Dec. 11, `1,954 3 Sheets-Sheet 2 ,mud aezz April 28, 1936. D. c. BERT PAPER MAKING MACHINE Filed Dec. ll, 1934 5 Sheets-Sheet 5 Patented Apr. 2s, 1936 UNITED- STATES PATENT oFFicE 2,038,708 PAPER MAKING MACHINE Daniel Catchpole Bert, York, Pa. Application December 11, 1934, Serial No. 757,055

s claims.' (c1. 9'2-49) i This invention proposes divers improvements in paper making machines, one object of the invention being to provide an arrangement of pressure rolls, located about a suction drum, in such a compact fashion that theA felts may be made much shorter than heretofore. A further object of the invention is to provide novel means whereby the pressure rolls exert a progressively-increasing pressure in the direction of the drum and act with progressively-decreasing resiliency upon the drum. F

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the inventon resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may-be made within the scope of what is claimed, without .departing from the spirit of the invention.

In the accompanying drawings:

Fig. 1 is a diagrammatic representation of the device forming the subject matter of this application, associated with a paper making machine;

Fig. 2 is a vertical section showing portions of the device claimed, lin operative relation to a suction roll, most portions being in elevation;

Fig. 3 is a transverse section taken through the part of the paper making ,machine wherein the present device has been incorporated, parts being broken away; v

Fig. 4 is a vertical transverse sectional view showing, in elevation and in section, parts which cooperate with a suction roller.

The numeral I in Figs. 3 and 2 designate a part of the frame of a. paper making machine, the frame including arches 2 (Figs. 3 and 4). On one side portion of the frame I, a standard 3 is mounted. A standard 4 is disposed opposite to the standard 3. A removable block 5, generally made of aluminum, is interposed between the lower end of the standard 4 and the adjacent part of the frame I. 'Ihe block 5 is held to the adjacent part of theframe I by a. dowel 6, or otherwise, and a key 'IA connects the block 5 with the standard 4. The block 5 is made of aluminum, in order that it may be light, and removable readily by one man, to permit the felts (hereinafter referred to) to be assembled with the suction roll hereinafter described.

Caps 8 are superposed upon the standards 3 and 4, and form parts thereof, the caps being connected to the standards, detachably, as shown at 9. In the .standards 3 and 4, and in the caps 8 are journaled tubular shafts I0, projecting out- Wardly from the end walls II o-f a suction drum 5 I2 having perforations I4, the end walls II .preferably being in contact with the innersurfaces of the standards 3 and,4, and the caps 8, to

hold the drumV I2 against movement in the direc- 'Ihe drum I2 may be of any 1o tion of its axis. desired construction and mayA be rotated by any suitable means, conventionally indicated by a gear I5 (Fig. 3) secured to one of the tubular .drum shafts I0, and meshing with a pinion I6 (Fig. 2) on a shaft I1 journaled in the standard 15 4. The suction means for he drum I2 is marked by the numeral 32..

The arches 2 (Fig. 44) are supplied with openings 48, which are 'elongated circumferentially ofthe arches. justment in the-openings 48. The slides 49 can be adjusted in the openings' 48 by means of screws 50, threaded into the arches 2 and engaging opposite sides of the slides 49, as Fig. 4 will show. Levers 5I and 52 are fulcrumed inter- 26 mediate their ends at53 on thelowermost slides 49, and are located at one side of the arches 2, as disclosed in Fig. 4. Screws 54 have their upper ends pivoted at 55 to the outer ends of the levers and pass slidably through lugs A5'l on 30 5I and 52, the arches-2. Hand wheels 56 are threaded/on the lower ends of the screws 54, and, cooperating with the lugs 51, constitute means for raising the inner ends of the levers 5I and 52. Radius arms 58 and 59 are pivoted at 60 to the uppermost 35 slides 49. Lifting screws 6I have their lower ends pivoted to the inner ends of the arms 58 and 59, the screws 6I passing upwardly .through the arches 2. Hand wheels 62 are threaded on the upper ends of the screws 3|, with the arches 2, constitute means whereby the radius arms 58 and 59 may be swung upwardly. at their inner ends. Bell crank levers 64 are fulcrumed at 65 on the slides 49 which are located in the lower right hand portions of the arches 2 45 in Fig. :1. 'I'he bell crank levers 64 are operated by screws 66, journaled in the arches 2 and held against longitudinal movement therein, the screws 66 being provided at their inner ends with hand wheels 61. 'I'he screws 66 are threaded into rid'- 50 ers 68, whereonto the depending arms of the bell crank levers 64 are connected pivotally and for limited movement, as shown at 69.

Referring to Fig. 4.a first shaft 'I0 is journaled on the inner ends of the levers 5I and carries a 55 Slides 49 are mounted for ad- 20 and, cooperating `40 rst pressure roll 1I cooperating with the drum I2. The nrst pressure roll 1I is of ordinary construction. inner ends o'f the levers 52 `and carries a second pressureA The second pressure roll 13 is made of highly resilient and soft material, such as rubber. A third shaft 14 is journaled on the inner ends of ther the drum I2. 'I'he pressure roll 11 is made of soft and resilient material, but is not so soft and resilient as the third pressure roll 15. A fifth shaft 18 is journaled on the inner ends ofr the bell crank levers 64.

The fifth shaft 18 carries a flfth'pressure roll 19, cooperating with the drum I2. The fifth pressure roll 19 of ordinary construction. f

The rst pressure roll 1I is located a little above the axis of rotation of the drum I2. o The pressure rolls 13, 15, 11, and 19 are spaced apart circumferentially of the drum I2. The roll 19 is located a little above the axis of rotation of the drum I2. Therolls 13, 15, and 11 are resilient, but they increase in hardness, in the order indicated. The rolls 13,` 15, and 11 engageY the drum I2 with progressively increasing pressures, because the shafts 12, 14, and 18 increase, in the order stated, in diameter 0r Width, and therefore in weight. As a matter of fact, the progression as to pressure extends from the first pressure roll 1I to the fth pressure roll 19.

In Fig. 1, the upper felt 80 receives the pulp from the cylinders' 8|, as usual, the couch rolls being shown at 82. The 4upper felt 80 passes around the pressure roll 1 I between the pressure rolls 13, 15, and 11, onthe one hand, and the drum I2 on the other hand, the upper felt beingA extended backwardly around the roll 19, and over idlers 83. The lower felt is marked by the numeral 34. It extends around idlers 85, and between the drum I2 on the one hand, and the upper felt 80 and the pressure rolls 1I, 13, 15, 11, and 19, on the other hand.

Owing toethe fact that the rolls 1I, 13, 15, 11,

' and 19 are arranged in compact form about the periphery of y the drum I2, at the place where the `partially completed stock goes to the driers (not shown) the felts 84 and 80 may be made much shorter than is customary. Persons conversant with the paper industry will recognize the de-` VA second shaft 12 is journaled on thek roll 13, cooperating with the drum I2.

sirability ofy making the felts 88 and 84. short,

because the felts are expensive, and ldo not last very long. One of the advantages of the device forming the subject matter of this application is that it is economical in the use of felts.

In practical operation, the drum I2 is rotated by the gears I5, the pinion I8 and the shaft I1, or their equivalent. the pulp from the cylinders 8i andthe pulp moves, along with the felts 84 and 80, part way around the periphery of the drum I2, under pres'- sure exerted by the rolls 1I, 13, 15,11, and 19,'the stock passing to athe driers, (not shown) at the roll 19. Suction is created in the drum I2 through the means shown at 32 in Fig. 3. The moisture in the stockis squeezed out of it by the rolls 1I-13-15-11-19, and the extraction of the moisture from the stock is promoted by reason of the fact that the lrolls 13, 15 and 11 increase progressively in hardness, and by reason of the fact that these rolls are thrust down by a The upper felt 80 receives correspondingly increasing progressive pressure,

as has been explained hereinbefore. The moisture passes through the perforations I4 of the drum I2 Ainto the drum, the moisture passing outthrough the suctionv connection means shown at 32.

Having' thus described vthe invention, what is claimed is:

1. In a paper making machine, a suction drum journaled for rotation, means for producing suc-l tion within the drum, pressure rolls, and means for supporting the pressure rolls about a portion of the periphery of the drum, for rotation, `the pressure rolls being resilient and decreasing progressively in resiliency.

2. In a paper making machine, a drum journaled for rotation, means for producing suction within the drum, pressure rolls, shaftsof different diameters supporting the vpressure rolls about a portion of the periphery of the drum, for rotation, and constituting means for causing they pressure rolls to exert a progressively increasing pressure on the drum initially determined by the wightslof the shafts, and means. under the control of anoperator for varying said initially de termined'pressure and still keeping the pressure progressive. l o

3. In a paper making machine, a drum journaled for rotation, means for producing suction within the drum, pressure rolls, and means for supporting the pressure rolls about a portion of the periphery of the drum, for rotation, the pressure rolls being resilient, and decreasing progresa sively in resiliency, the pressure rolls exertinga progressively increasing pressure on the drum.

' DANIEL CATCHPOLE BERT. 

